Slidell, Louisiana: natural disaster risk
How exposed Slidell is to floods, storms and other hazards, from FEMA and NOAA records for St. Tammany Parish.
Slidell is a city of 28,561 people in St. Tammany Parish, Louisiana. FEMA's National Risk Index rates St. Tammany Parish relatively high for natural hazards overall, higher than most of the US. The costliest hazards there are hurricane, inland flooding and cold wave, with about $249 million in expected losses a year across the county. The weather service has logged 730 storm reports in the county since 1957, including 74 tornadoes and 154 floods. NOAA hurricane records show 21 hurricanes and 36 tropical storms passing within 65 miles of the county's center, 7 of them major. About 40.5% of homes in the county carry federal flood insurance.
Risk figures are for St. Tammany Parish. FEMA National Risk Index December 2025; NOAA Storm Events; US Census Bureau ACS 2020 to 2024. Updated November 6, 2026.
Top risks in Slidell
Full St. Tammany Parish report ›- Know your evacuation zone and route before June 1.
- Ask about roof age, shutters and the separate wind or hurricane deductible on your home policy.
- Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
- Price a flood policy now. Most new federal policies take 30 days to start.
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
All hazards
| Hazard | Rating | A year |
|---|---|---|
| Hurricane | $143M | |
| Inland flooding | $70M | |
| Cold wave | $9M | |
| Heat wave | $8M | |
| Tornado | $6M | |
| Coastal flooding | $3M | |
| Lightning | $2M | |
| Hail | $2M | |
| Strong wind | $1M | |
| Wildfire | $1M | |
| Drought | $988K | |
| Earthquake | $724K |
Homes in Slidell
Older homes and mobile homes usually take more damage in storms, floods and earthquakes. Ask about roof age, flood history and retrofits before you buy or rent.
Strongest tornadoes in St. Tammany Parish
Other cities in Louisiana
All ›Common questions about Slidell
Is Slidell safe from natural disasters?
Slidell is in St. Tammany Parish, which FEMA's National Risk Index rates relatively high overall, higher than most of the US. The biggest hazards are hurricane, inland flooding, cold wave. No place is free of risk, so check the flood map and insurance for any home you consider.
What natural disasters happen in Slidell?
By expected yearly losses in St. Tammany Parish, the top hazards are hurricane (Very High), inland flooding (High), cold wave (High). St. Tammany Parish has been part of 47 federal disaster or emergency declarations for natural events.
Does Slidell get tornadoes?
Yes. NOAA records list 74 tornadoes in St. Tammany Parish since 1950; the strongest was an EF3 tornado on May 26, 2011 near Blond. FEMA rates tornado risk in the county moderate.
Do I need flood insurance in Slidell?
Standard home insurance does not cover floods. In St. Tammany Parish, about 40.5% of homes have federal flood insurance, and FEMA rates inland flooding risk high. Check the FEMA flood map for your address and get a quote even outside a high-risk zone.